PT-2019-14846 · Ubiquiti · Edgemax

Grampae · Published 2019-09-25 · Updated 2020-08-24 · CVE-2019-16889

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Ubiquiti EdgeMAX devices versions prior to 2.0.3

Description The issue allows remote attackers to cause a denial of service due to disk consumption. This occurs when a valid length payload of 249 characters or fewer is provided to the beaker.session.id cookie in a GET header, resulting in the creation of *.cache files in /var/run/beaker/container file/. An attacker can exploit this by using a long series of unique session IDs.

Recommendations For versions prior to 2.0.3, update to version 2.0.3 or later to resolve the issue. As a temporary workaround, consider restricting access to the beaker.session.id cookie to minimize the risk of exploitation.

Exploit

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2019-16889

Affected Products

Edgemax

References · 5

• 🔥 https://mjlanders.com/2019/07/28/resource-consumption-dos-on-edgemax-v1-10-6 · Exploit
• 🔥 https://hackerone.com/reports/406614 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2019-16889 · Security Note
• https://community.ui.com/releases/New-EdgeRouter-firmware-2-0-3-has-been-released-2-0-3/e8badd28-a112-4269-9fb6-ffe3fc0e1643 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-16889 · Vendor Advisory